Peterffy, the founder of Interactive Brokers, an online discount trading platform based in Connecticut, is buying up millions of dollars of air time nationally on CNN, CNBC and Bloomberg for a television ad indicting socialism and asserting that the country he immigrated to as boy is heading down that path.

The minute-long spot is narrated by Peterffy, who appears on camera and tells viewers he’s voting Republican in next month’s election.

“I think this is a very slippery slope,” Peterffy tells viewers. “It seems like people don’t learn from the past.”

What’s remarkable about the ad is that Peterffy is neither on the ballot, nor has he created his own political action committee or 527 group as the vast majority of billionaire political activists favor.

A message seeking comment was left Thursday by Hearst Newspapers for Peterffy, whose ad is said to be running in Columbus, Ohio, and Milwaukee, Wisc. Ohio has the highest concentration of Hungarian-Americans in the nation.

Soros, 82, a hedge funder who was born in Budapest, gave $23 million to 527 groups in a failed attempt to oust President Bush during the 2004 election.

A public records check showed that Peterffy is not enrolled in a political party.

In 2004, Peterffy dropped $45 million on an 80-acre horse farm in backcountry Greenwich that boasts a main house with two master suites, six additional bedrooms, a swimming pool, sauna, wine cellar and servants’ quarters, four guest houses, a caretaker’s cottage, two grooms’ quarters and a horse stable with 22 stalls.

The town stripped Peterffy’s property of a farmland exemption that could have allowed him and his partners to get a generous tax break on the estate.

The partners initially appealed the change, only to later withdraw their bid, but not before one of Peterffy’s associates offered to grow hay and breed horses in return for the designation.

The stone facade of an enormous barn that once graced the 80-acre Greenwich horse farm owned by Thomas Peterffy.